Update: O2 says its network has been restored for all customers affected by the recent downtime, and advises anyone still experiencing problems to restart their handset.
Original: The O2 UK service outage that began affecting some users yesterday lunchtime is in the process of being fixed, it seems. Not all O2 subscribers have been affected, but those caught up in the past day's outage have found themselves unable to use O2's voice or data networks on their handsets. The issue has also been affecting some on Tesco Mobile and GiffGaff, both of which use O2's network.
The British carrier has been posting updates on the glitch through its service status website overnight, in addition to communicating via its official Twitter account. The last status update reads --
Following the previous update that our 2G network service has now been restored, our 3G service has been restoring gradually. We expect full service to return this afternoon. In the meantime customers who were affected should still be able to make and receive calls (and may wish to try switching their mobile phones off and on as service returns). We are sorry again for the inconvenience this has caused some customers. We continue to deploy all possible resources, and will do so until full service is restored.
A previous update said that O2 had identified an issue with its network equipment, which was preventing some customers from being able to register on the network. Such an outage is unprecedented for a major network in the UK -- usually network outages are localized and quickly resolved. Now O2, which may now be required under UK consumer law to compensate affected customers, will likely be closely examining the root cause of this to prevent any recurrence in the future.
If you're on O2 UK, be sure to drop by the comments and let us know if you're among the disconnected.
More: O2 UK status page